Results Of Incorrect Operation
| • | A plugged valve or hose may cause the following conditions: |
| - | Stalling or slow idle speed |
| • | A leaking crankcase ventilation valve or hose may cause the following
conditions: |
Functional Check
If an engine is idling rough, check for a clogged crankcase ventilation
valve, a dirty vent filter, air cleaner element, or plugged hose. Replace
components as required. Use the following procedure:
- Remove the crankcase
ventilation valve from the rocker arm cover.
- Operate the engine at idle.
- Place your thumb over the end of the valve in order to check
for a vacuum. If there is no vacuum at the valve, check for the following
items:
| • | The crankcase ventilation valve |
- Turn OFF the engine.
- Remove the crankcase ventilation valve.
- Shake the valve. Listen for the rattle of the check needle inside
of the valve. If valve does not rattle, replace the valve.
